Logging & Troubleshooting

Logging & Metrics

You will see logs for:

• open — breaker tripped
• halfOpen — testing recovery
• close — back to normal
• failure, reject — throttled to reduce noise

Troubleshooting

"Breaker is open"

The backend had too many failures or timed out. Wait for the reset period — it recovers automatically.

Too many rejects

Try:

• lowering the error threshold
• reducing the timeout
• switching to a more tolerant preset (TOLERANT, RELAXED_DEBUG)

Not tripping when expected

Only infrastructure failures count. This includes 5xx errors, network issues, 408 (Request Timeout), and 429 (Too Many Requests). Other 4xx business errors are intentionally ignored.